MY MMU1 extruder motors where running a bit hot on long prints so I designed this for them.

PLEASE DO NOT attempt to wire up the fans or switch box unless you know how to, If you don't get someone to help you that does.

The Switch box is completely optional you can wire it in anyway you want to and use any 40x40x10 fan as well.

You will need 2x 40x40x10 12V fans
I used this fan which comes with mounting screws:
[https://www.amazon.com/dp/B009NQLT0M/ref=cm_sw_r_tw_dp_U_x_Q37jDbM4TNNN7](https://www.amazon.com/dp/B009NQLT0M/ref=cm_sw_r_tw_dp_U_x_Q37jDbM4TNNN7)

As for how to wire the fans up you can use the optional
"Switch box" that I used in the pictures or just connect them as you like.

These are the parts I used on the switch box

LED Light:
[https://www.amazon.com/dp/B074SH8GTK/ref=cm_sw_r_tw_dp_U_x_ed8jDbMF1XKPA](https://www.amazon.com/dp/B074SH8GTK/ref=cm_sw_r_tw_dp_U_x_ed8jDbMF1XKPA)

Switch:
[https://www.amazon.com/dp/B071Y7SMVQ/ref=cm_sw_r_tw_dp_U_x_M37jDb53RS27T](https://www.amazon.com/dp/B071Y7SMVQ/ref=cm_sw_r_tw_dp_U_x_M37jDb53RS27T)

Male DC connector:
[https://www.amazon.com/dp/B073W4V9VB/ref=cm_sw_r_tw_dp_U_x_S37jDb8PYWZE7](https://www.amazon.com/dp/B073W4V9VB/ref=cm_sw_r_tw_dp_U_x_S37jDb8PYWZE7)

DC power supply:
[https://www.amazon.com/dp/B00Q2E5IXW/ref=cm_sw_r_tw_dp_U_x_J37jDb9VGBTMJ](https://www.amazon.com/dp/B00Q2E5IXW/ref=cm_sw_r_tw_dp_U_x_J37jDb9VGBTMJ)

Print instructions

You will need to print 2x of the Cooling towers and I included the files as .amf which will work for both MMU and single mode.

You will need supports on the "Switch box".
Support blockers are included in Switch box .amf file because only a few areas need them.
Print at 0.20mm resolution.

Switch box lid doesn't need supports but prints better at
0.15mm or 0.10mm resolution.